High-level library for the WHATWG Fetch Living Standard.
purescript-fetch works on browser and Node.js. Running on Node.js requires version >17.5, see # Usage.
Note: Node.js <17.5 is not supported. Node.js >=17.5 and <18.0 requires the --experimental-fetch node options:
NODE_OPTIONS=--experimental-fetch spago run
Node.js >=18.0 you don't need to set the --experimental-fetch node option.
Perform a simple GET request:
fetch "https://httpbin.org/get" {} >>= _.text
Perform a POST request:
do
{ status, text } <- fetch "https://httpbin.org/post"
{ method: POST
, body: """{"hello":"world"}"""
, headers: { "Content-Type": "application/json" }
}
responseText <- text
fetch works well with yoga-json and argonaut, use our little helper libraries.
spago install fetch-yoga-json
type HttpBinResponse = { json :: { hello :: String } }
main :: Effect Unit
main = launchAff_ do
{ json } <- fetch "https://httpbin.org/post"
{ method: POST
, body: writeJSON { hello: "world" }
, headers: { "Content-Type": "application/json" }
}
{ json: { hello: world } } :: HttpBinResponse <- fromJSON json
log world
spago install fetch-argonaut
type HttpBinResponse = { json :: { hello :: String } }
do
{ json } <- fetch "https://httpbin.org/post"
{ method: POST
, body: toJsonString { hello: "world" }
, headers: { "Content-Type": "application/json" }
}
{ json: { hello: world } } :: HttpBinResponse <- fromJson json
log world
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